/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb;

import org.apache.iotdb.jdbc.IoTDBSQLException;

import java.sql.*;
import java.util.ArrayList;
import java.util.List;

public class SyntaxConventionRelatedExample {
    /**
     * if you want to create a time series named root.sg1.select, a possible SQL statement would be
     * like: create timeseries root.sg1.select with datatype=FLOAT, encoding=RLE As described before,
     * when using session API, path is represented using String. The path should be written as
     * "root.sg1.select".
     */
    private static final String ROOT_SG1_KEYWORD_EXAMPLE = "root.sg1.select";

    /**
     * if you want to create a time series named root.sg1.111, a possible SQL statement would be like:
     * create timeseries root.sg1.`111` with datatype=FLOAT, encoding=RLE The path should be written
     * as "root.sg1.`111`".
     */
    private static final String ROOT_SG1_DIGITS_EXAMPLE = "root.sg1.`111`";

    /**
     * if you want to create a time series named root.sg1.`a"b'c``, a possible SQL statement would be
     * like: create timeseries root.sg1.`a"b'c``` with datatype=FLOAT, encoding=RLE The path should be
     * written as "root.sg1.`a"b`c```".
     */
    private static final String ROOT_SG1_SPECIAL_CHARACTER_EXAMPLE = "root.sg1.`a\"b'c```";

    /**
     * if you want to create a time series named root.sg1.a, a possible SQL statement would be like:
     * create timeseries root.sg1.a with datatype=FLOAT, encoding=RLE The path should be written as
     * "root.sg1.a".
     */
    private static final String ROOT_SG1_NORMAL_NODE_EXAMPLE = "root.sg1.a";

    private static final String DEVICE = "root.sg1";

    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        Class.forName("org.apache.iotdb.jdbc.IoTDBDriver");
        try (Connection connection =
                     DriverManager.getConnection(
                             "jdbc:iotdb://127.0.0.1:6667?version=V_0_13", "root", "root");
             Statement statement = connection.createStatement()) {

            // set JDBC fetchSize
            statement.setFetchSize(10000);

            // create time series
            try {
                statement.execute(String.format("CREATE DATABASE %s", DEVICE));
                statement.execute(
                        String.format(
                                "CREATE TIMESERIES %s WITH DATATYPE=INT64, ENCODING=RLE, COMPRESSOR=SNAPPY",
                                ROOT_SG1_DIGITS_EXAMPLE));
                statement.execute(
                        String.format(
                                "CREATE TIMESERIES %s WITH DATATYPE=INT64, ENCODING=RLE, COMPRESSOR=SNAPPY",
                                ROOT_SG1_KEYWORD_EXAMPLE));
                statement.execute(
                        String.format(
                                "CREATE TIMESERIES %s WITH DATATYPE=INT64, ENCODING=RLE, COMPRESSOR=SNAPPY",
                                ROOT_SG1_NORMAL_NODE_EXAMPLE));
                statement.execute(
                        String.format(
                                "CREATE TIMESERIES %s WITH DATATYPE=INT64, ENCODING=RLE, COMPRESSOR=SNAPPY",
                                ROOT_SG1_SPECIAL_CHARACTER_EXAMPLE));
            } catch (IoTDBSQLException e) {
                System.out.println(e.getMessage());
            }

            // show timeseries
            ResultSet resultSet = statement.executeQuery("show timeseries root.sg1.*");
            List<String> timeseriesList = new ArrayList<>();
            while (resultSet.next()) {
                timeseriesList.add(resultSet.getString("Timeseries"));
            }
            for (String path : timeseriesList) {
                for (int i = 0; i <= 10; i++) {
                    statement.addBatch(prepareInsertStatement(i, path));
                }
            }
            statement.executeBatch();
            statement.clearBatch();

            resultSet = statement.executeQuery("select ** from root.sg1 where time <= 10");
            outputResult(resultSet);
            for (String path : timeseriesList) {
                // For example, for timeseires root.sg1.`111`, sensor is 111, as described in syntax
                // convention, it should be written as `111` in SQL
                // in resultSet of "show timeseries", result is root.sg1.`111`, which means you need not to
                // worry about dealing with backquotes yourself.
                resultSet =
                        statement.executeQuery(String.format("select %s from root.sg1", removeDevice(path)));
                outputResult(resultSet);
            }
        } catch (IoTDBSQLException e) {
            System.out.println(e.getMessage());
        }
    }

    private static void outputResult(ResultSet resultSet) throws SQLException {
        if (resultSet != null) {
            System.out.println("--------------------------");
            final ResultSetMetaData metaData = resultSet.getMetaData();
            final int columnCount = metaData.getColumnCount();
            for (int i = 0; i < columnCount; i++) {
                System.out.print(metaData.getColumnLabel(i + 1) + " ");
            }
            System.out.println();
            while (resultSet.next()) {
                for (int i = 1; ; i++) {
                    System.out.print(resultSet.getString(i));
                    if (i < columnCount) {
                        System.out.print(", ");
                    } else {
                        System.out.println();
                        break;
                    }
                }
            }
            System.out.println("--------------------------\n");
        }
    }

    private static String prepareInsertStatement(int time, String path) {
        // remove device root.sg1
        path = removeDevice(path);
        return String.format(
                "insert into root.sg1(timestamp, %s) values(" + time + "," + 1 + ")", path);
    }

    private static String removeDevice(String path) {
        return path.substring(DEVICE.length() + 1);
    }
}
